FIGURE 7 Pump characteristics, radial blades (lb/in2 X 6.894 = kPa; gpm X 0.06309 = l/s) (Reference 4)

Table 1 shows the pertinent results for six different pumps. Both flow rate and efficiency were drastically reduced, and there was only a modest increase in head for five of the six pumps. The sixth pump showed a 38% increase in head over that obtained with the impeller correctly mounted. Published estimates7,8 of the head-flow curves to be expected from reversed impellers predict an unstable characteristic at the low end of the flow rate range and a steep characteristic at the high end of the range.

Survival Treasure

Survival Treasure

This is a collection of 3 guides all about survival. Within this collection you find the following titles: Outdoor Survival Skills, Survival Basics and The Wilderness Survival Guide.

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